20-year-old Guddu Yadav of Birjung Municipality-24 killed his 40-year-old mother on July 9 by attacking her with a sickle. Guddu hit his mother with a sickle after she refused to give him the money obtained after selling a buffalo. Guddu chased Shovadevi some four hundred meters away from the home and hit her with a sharp weapon. Shovadevi, who got hit in chin and throat, died on the spot, said the police.  The dead body is kept in Narayani Hospital of Birgunj while Guddu was arrested from the spot.